Liblade is an awesome 2.5D sidescroll slash action game developed by Eh. Every action is so fluid and the diversity of attacks is pretty great. When you push it to a centern direction, it keep attack at that direction otherwise it really easy to make thumb tired.
The action is fast, heavy and satisfying, not to mention it all looks damn cool. The game could likely benefit from a little more enemy variety. If you get stuck in the game, check out the video walkthrough and gameplay for the game.